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Site Reclamation Activity . April 2001 - March 2002 Page 8 2) American Tunnel area a) Cement Creek above (CC1/CC1A/CC1B) and below (CC2) complex. b) Springs in the area of the now reclaimed waste dump (ATS1, ATS2). 3) Eureka Creek between Sunnyside Basin and the Terry Tunnel (EC1). 4) Mine Pool a) American Tunnel b) Terry Tunnel MONITORING - Discussion of Water Quality Monitoring Results 1) Mayflower Millsite area The Animas River and Boulder Creek monitoring results continue to exhibit increased zinc and manganese concentrations between the upstream and downstream monitoring points during the spring sampling event although the differential appears to have been reduced as a result of the completed diversion projects. Summer or fall sampling events have continued to show smaller or no significant change between these same points. Other surface and groundwater sample results in the Mayflower Mill area (Pond No.3 stream SCTP31 and SCTP32 and Wells EOMW1 and EOMW2) were at or below levels of metals observed in the past. 2) American Tunnel area Cement Creek monitoring reflects some improvement due to stream treatment. Seeps entering the stream bed between CC1 and CC2 carry enough metals that CC2 quality is not the same as treated effluent from the American Tunnel treatment system even though basically all of the stream flow has been treated from August through the end of April, since 1996 (except for June 1999-November 1999 when treatment was temporarily suspended). The seep ATS2, originally from the toe of the American Tunnel waste dump, has maintained the level of improvement first seen after completion of the waste dump reclamation. The seep ATS1 appears to have disappeared or relocated due to the reclamation of the waste dump. 3) Terry Tunnel/Lake Emma Eureka Creek monitoring above the Terry Tunnel continues to show the same level of improvement, as compared to previous years.